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Development of a software package for determination of geodynamic parameters from combined processing of SLR data from LAGeOS and LeO

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Geodesy and Geodynamics 2017年第3期8卷 213-220页

作者： konstantin ebauer Institute of Astronomy Russian Academy of Sciences

In this study, a method for determination of stations coordinates, earth rotation parameters and gravity field coefficients in one solution from SLR data from LAGeOS and LeO is presented. A new software package based on the presented method has been developed. All recommendations from IeRS Con- ventions 2010 have been included. In addition, some other perturbations and loading effects are taken into account： atmospheric tides, non-tidal atmosphere and ocean variability, albedo and non-tidal at- mospheric pressure loading. Results of different solutions with the use of only LAGeOS data or LAGeOS plus LeO satellites data are presented. Pole coordinates obtained from both solutions show comparable accuracy relative to IeRS 08 C04 solution. As for UT1 corrections in terms of Length-of-Day an additional improvement in accuracy is found： 1.0 ms for LAGeOS and 0.2 ms for the combined LAGeOS ＋ LeO solution. Time series of the estimated degree-2 gravity field coefficients show a very good agreement with results of the Center of Space Research （Austin/USA）. As a final remark, some future mandatory steps are outlined.

关键词： SLR LAGeOS LeO Gravity field earth rotation GGOS

A new adaptive Kalman filter for navigation systems of carrier-based aircraft

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Chinese Journal of Aeronautics 2022年第1期35卷 416-425页

作者： Lifei ZHANG Shaoping WANG Maria Sergeevna SeLeZNeVA konstantin Avenirovich NeUSYPIN Department of Informatics and Control Systems Bauman Moscow State Technical University Moscow 101000Russia School of Automation Science and electrical eingineering Beihamng University Beijing 100083China

The features of carrier-based aircraft’s navigation systems during the approach and landing phases are investigated.A new adaptive Kalman filter with unknown state noise statistics is proposed to improve the accuracy of the INS/GNSS integrated navigation *** adaptive filtering algorithm aims to estimate and adapt the unknown state noise covariance Q in high dynamic conditions,when the measurement noise covariance R is assumed to be known empirically in *** new adaptive Kalman filter based on the innovation sequence and pseudo-measurement vector approach makes it more effective to estimate and adapt *** simulation results and semi-physical experiments show that the application of the proposed adaptive Kalman filter can guarantee a higher estimation accuracy of the state variables.

关键词： Adaptive filters Apriori statistics Deck landing aircraft Innovation sequence State noise covariance

HIV protease:late action to prevent immune detection

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Signal Transduction and Targeted Therapy 2021年第5期6卷 1408-1409页

作者： konstantin M.J.Sparrer Frank Kirchhoff Institute of Molecular Virology Ulm University Medical CenterUlmGermany

A recent study published in Science by Wang and colleagues shows that premature activation of the HIV-1 protease leads to caspase activation and recruitment domain 8(CARD8)inflammasome-mediated pyroptosis of infected macrophages and CD4+T cells(Fig.1).These findings might help to improve approaches aiming to eliminate the latent viral reservoirs upon HIV-1 *** invading viral pathogens trigger the innate immune system and are usually rapidly controlled and eventually *** sense viral intruders via so-called pattern recognition receptors(PRRs)capable of detecting pathogen-associated molecular patterns(PAMPs)allowing discrimination between self and *** many cases,these patterns are viral nucleic acids that show pathogen-specific structures or emerge at the wrong localization in the ***,activation of PRRs by their respective ligands leads to the induction of various anti-viral signaling cascades,among them the inflammasome.

关键词： eventually action eliminate

The error-Minimization-Based Strategy for Moving Mesh Methods

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Communications in Computational Physics 2006年第1期1卷 53-80页

作者： konstantin Lipnikov Mikhail Shashkov Los Alamos National Laboratory MS B284Los AlamosNM87545USA

The typical elements in a numerical simulation of fluid flow using moving meshes are a time integration scheme,a rezone method in which a new mesh is defined,and a remapping(conservative interpolation)in which a solution is transferred to the new *** objective of the rezone method is to move the computational mesh to improve the robustness,accuracy and eventually efficiency of the *** this paper,we consider the onedimensional viscous Burgers’equation and describe a new rezone strategy which minimizes the L2 norm of error and maintains mesh *** efficiency of the proposed method is demonstrated with numerical examples.

关键词： Moving meshes Burgers’equation error estimates

Research Progress and Future Perspectives on Rechargeable Na-O_(2) and Na-CO_(2) Batteries

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energy & environmental Materials 2021年第2期4卷 158-177页

作者： Zhi Zheng Chang Wu Qinfen Gu konstantin konstantinov Jiazhao Wang Institute for Superconducting and electronic Materials University of WollongongWollongong NSW 2522Australia The Australian Synchrotron(ANSTO) 800 Blackburn RoadClayton VIC 3168Australia

Rechargeable sodium–oxygen(Na-O_(2))and sodium–carbon dioxide(Na-CO_(2))batteries have attracted intensive research attention in recent years owing to their advantages of high theoretical energy density,modest cost,abundance of sodium resources,and promising potential for achieving real sodium–air batteries in large-scale energy storage ***,current research on Na-O_(2)and Na-CO_(2)batteries is facing enormous challenges,such as low energy efficiency and limited cycle life,which are restricting their progress at the initial ***,understanding their working principles,and the chemical and electrochemical reactions of the electrodes is indispensable to achieve their practical application and even the goal of true sodium–air *** review aims to provide an overview of the research developments and future perspectives on Na-O_(2)and Na-CO_(2)batteries,which include the major aspects,such as working mechanisms,air cathode materials design strategies,sodium anode protection,and electrolyte ***,the remaining issues and future research directions are also thoroughly discussed and presented.

关键词： anode protection cathode materials electrolytes Na-CO_(2)batteries Na-O_(2)batteries

Rotordynamic prediction of mode order transition when rotor has an overhang

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航空动力学报 2015年第2期30卷 397-409页

作者： konstantin Shaposhnikov HONG Jie ZHANG Da-yi MA Yan-hong School of energy and Power engineering Beijing University of Aeronautics and Astronautics

Nowadays rotating machinery grows and develops extremely fast due to its multi-branch *** the fields of rotordynamics and rotor balancing had a strong background based on previous experience in order to perform efficient and safe operation for the rotating machines,still there are problems which are hard to be dealt with in some special *** of them is balancing of the rotor with huge *** with overhang is inherent to have console modes,which previously often were observed separately from the other modes in rotordynamic *** such a way console modes,their behavior,order of appearance and interaction with other modes were described in current paper in more *** results confirmed that console modes obey the principle of orthogonality in the same way as all other modes and hence could be efficiently balanced using modal balancing *** results revealed likelihood of such phenomena as modes order transition,when the rotor has an *** a consequence perfectly balanced console rotor could not be so due to modes order transition effect when the bearing stiffness in situ differs from bearing stiffness of balancing *** results will be useful for engineers who are involved in area of rotating machinery vibration tuning for the rotor with huge overhang and benefit them to recognize these modes efficiently and to perform balancing successfully.

关键词：疲劳寿命分散性顺序统计量寿命分散系数小子样

Numerical study of high-lift hydrofoil near free surface at moderate Froude number

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Journal of Hydrodynamics 2020年第1期32卷 44-53页

作者： Tao Xing konstantin I.Matveev Miles P.Wheeler Department of Mechanical engineering The University of IdahoMoscowIdahoUSA School of Mechanical and Materials engineering Washingion State UniversityPullmanWashingtonUSA

Shallow hydrofoils are known to produce lower lift in normal operating conditions in comparison with deep ***,the maximum lift capability of shallow hydrofoils at moderate speeds,which is important for transitional regimes of hydrofoil boats,is studied *** this work,two-dimensional flow around a high-lift hydrofoil at a moderate Froude number is numerically simulated in a broad range attack angles up to the stall occurrence in both single-phase fluid and in the vicinity of free *** is found that nearly the same maximum lift coefficient can be produced by the shallow foil in the modeled condition as by the deep foil,but much higher attack angle is required near the free surface,which also results in larger ***,it is shown that higher Reynolds numbers lead to higher lift coefficients,especially at large attack angles.

关键词： Hydrofoil numerical simulation free surface effect stall

High-resolution photoacoustic microscope for rat brain imaging in vivo

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Chinese Optics Letters 2010年第6期8卷 609-611页

作者：杨孝全蔡鑫 konstantin Maslov 汪立宏骆清铭 Britton Chance Center for Biomedical Photonics Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and Technology Optical Imaging Laboratory Department of Biomedical EngineeringWashington University in Saint LouisSaint Louis63130-4899USA

A reflection-mode photoacoustic microscope（PAM） for rat brain imaging in vivo is constructed.A pulsed laser is used as an excitation source,and a focused ultrasound transducer is adopted to collect the photoacoustic *** scanning is applied to acquire three-dimensional（3D） *** obtained measurements of the lateral and axial resolutions of the microscope are 45 and 15μm,*** imaging depth in the chicken breast tissue is 3.1 mm at a signal-to-noise ratio（SNR） of 20 dB without any signal *** imaging speed is 30 A-line/*** results in vivo demonstrate the capability of 3D imaging of the brain vessels of the rat after removing the skull.

关键词： Acoustic microscopes Laser excitation Photoacoustic effect Photoacoustic microscopy Pulsed laser applications Pulsed lasers Signal to noise ratio Ultrasonic transducers

Cooling and energy loss of partially ionized hydrogen gas behind a shock wave

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Research in Astronomy and Astrophysics 2018年第8期18卷 111-116页

作者： Oksana Mikhailovna Belova konstantin Veniaminovich Bychkov Faculty of Physics Lomonosov Moscow State University Sternberg Astronomical Institute Lomonosov Moscow State University

We studied the difference in behavior of total energy and its thermal component during the radiative cooling of partially ionized hydrogen gas. Our calculations were fulfilled for the conditions in the atmosphere of a... 详细信息

关键词： stellar atmospheres shock wave